Lock-nut.



D. GAST & A. WERTZ.

LOOK NUT.

APPLICATION FILED MAY 22, 1913.

Patented May 19, 1914.-

SJ mum W018 w vtmeomzo UNITED STATES PATENT OFFICE.

DWIGHT GAST, OF CLEVELAND, AND AMBROSE WERTZ, OF SEVILLE, OHIO.

LOCK-NUT.

Specification of Letters Patent.

Patented May 19, 1914.

Application filed May 22, 1913. Serial No. 769,129.

To all whom it may concern:

Be it known that we, DWIGHT (her and AMBROSE WERTZ, citizens of the United States, residing at Cleveland and Seville, re-

and adjust itself to the threads of the bolt,

and may be operated in practice without injury to the threads of either the nut or bolt.

A further object is to provide an improved lock nut blank formed of a single piece or length of material adapted to be readily bent to form the completed lock nut so that the latter may be readily and cheaply formed, the threaded portion of the lock nut being preferably of hardened steel so that as the threads on the bolt become worn, the split portions of the lock nut may be adjusted or drawn together to not only take up wear, but cut threads in the bolt so as to prevent slipping or other injury to the threads.

A still further object is to provide an improved lock nut in which the clamping or locking device may be readily operated with an ordinary wrench.

WVith the above-mentioned and other ends in view, the invention consists in the novel construction, arrangement, and cor'nbina tion of parts, hereinafter described, illus' trated in some of its embodiments in the ac companying drawings, and particularly pointed out in the appended claims.

Referring to the drawings, forming a part of this specification, Figure 1, 18 a cross sectional view of the improved lock nut in its operative or looking position ap plied to an ordinary threaded bolt. Fig. 2, a perspective view of the improved lock nut, detached. Fig. 3, a side elevation of the improved lock nut blank, on a reduced scale, before being bent or formed up. Fig. 4, a side elevation of a modified form of lock nut operatively applied to an ordinary threaded.

bolt.

screw 6.

Similar numerals of reference designate like parts throughout all the figures of the drawings.

The improved lock nut is adapted to be formed from a single length or blank of material shown on a reduced scale in Fig. 3, of the drawings, said blank comprising an irregularly shaped body curved on one side and of angular shape on the other to form the sides 1, 2, and 3, of the lock nut when formed or completed, as shown in Figs. 1, 2, and 4, of the drawings. The curved side of the blank may be threaded as at 4, so that when the blank is formed up it will form the threaded opening 4, in the completed nut, as shown in the other figures of the drawings.

The ends 5, of the blank are provided with openings 5*, and 5", the opening 5", being of reduced diameter and threaded to receive the threaded portion 6, of the cap The opening 5, is adapted to loosely receive the unthreaded portion of the cap screw 6, toprovide for the requisite relative movements of the parts as the adj acent split ends 5, are drawn toward or from each other in the act of locking and unlocking the nut upon the bolt. The end 5, provided with the larger opening 5, is inset as at 5, said inset portion 5, being of a depth corresponding to the thickness of the hexagon head 6*, of the cap screw, and being of sufficient length to readily receive the jaws of the wrench in adjusting the cap screw 6.

The split portion between the ends 5, of the nut and adjacent to the threaded opening is adapted to form a longitudinally ex tending rib 7, along the threads of the bolt, as shown in Figs. 1 and 4, when the ends 5, of the lock nut have been drawn up to their locked position, thereby securely locking the nut upon the bolt and preventing it from turning rearwardly or becoming loose.

In the modified form of lock nut shown in Fig. 4, the split portion 5 between the ends 5, is continued into the opposite threaded or rear walls of the lock nut as at 5 thereby forming a second gripping portion to form a second rib 7, along the threads when the lock nut is clamped in its locking position.

From the foregoing description, taken in connection with the accompanying drawings, the operation and advantages of our invention will be readily understood.

side being adapted to form the threaded nut 15 opening and said projections the corners of the nut when the blank is formed up.

In testimony whereof We have afiixed our signatures in presence of two witnesses.

DWIGHT GAST. AMBROSE WERTZ.

Witnesses for Gast:

R. L. SHERIDAN, H. F. WALKEMEYER. Witnesses for Wertz: ELMER ELEY, W. G. BRUMBAUGH. 

